False alarm or junk mail perhaps?
Similar report here click here:
"THIS IS AN AUTOMATED MESSAGE . THERE’S NO NEED TO REPLY.
This is just a note to remind you that your mailbox is nearly full.
This may be as a result of you receiving many emails or large files
that have used up a large part of your quota.
This means that if you don.t deal with it very soon your incoming mail
won’t get to you, but don’t worry it’s easy to sort out. Simply delete
the messages you don’t need from your “Inbox”, “Sent”, “Trash/Deleted”
and any other webmail folder, starting with the oldest ones first.
That way you’ll make plenty of room for your new messages and you’ll
start to receive them straight away. Please remember that we can’t keep
any emails that we can’t deliver to you. So it’s important to make
sure you’ve always got space in your mailbox for incoming messages.
Quota Type: bytes in the mailbox
Quota Available: 11207696
Total Quota: 31457280"
If you think it's genuine you can always check with your ISP/email provider(s). G